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Leg Muscles: Origin, Insertion, Action, and Comments on Major Muscles, Slides of Anatomy

Detailed information about the leg muscles, including their origin, insertion, action, and comments on the rectus femoris, biceps femoris, vastus lateralis, vastus medialis, semitendinosus, and semimembranosus. Understanding the anatomy of these muscles is essential for medical professionals, athletes, and individuals interested in physiology.

What you will learn

  • What is the role of the semitendinosus muscle in leg movement?
  • What is the origin and insertion of the rectus femoris muscle?
  • Where does the vastus medialis muscle originate and insert?
  • What is the action of the biceps femoris muscle?
  • Which muscles make up the hamstring group and what is their function?

Typology: Slides

2021/2022

Uploaded on 09/12/2022

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Rectus fe mori s Bicep s f emori s
Vas tus la te rali s Semite n dino sus
Vas tus med iali s Semime mbran osu s
Vas tus in termedi us
MUSCLES THAT MOVE THE LEG
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Rectus femoris Biceps femoris Vastus lateralis Semitendinosus Vastus medialis Semimembranosus Vastus intermedius

MUSCLES THAT MOVE THE LEG

Origin:

 Anterior inferior iliac spine

Insertion:

 Tibial tuberosity

Action:

 Extend knee  Flex hip

Comment:

 Crosses 2 joints, hip and knee  Sometimes injection site

RECTUS FEMORIS

Origin:

 Greater trochanter

Insertion:

 Tibial tuberosity

Action:

 Extends knee

Comment:

 Lateral aspect of thigh  Sometimes injection site

VASTUS LATERALIS

Origin:

 Linea aspera of femur

Insertion:

 Tibial tuberosity

Action:

 Extends knee

VASTUS MEDIALIS

Origin:

 Ischial tuberosity - LH  Linea aspera - SH  Distal femur - SH

Insertion:

 Head of fibula and tibia

Action:

 Flexes knee  Extends and adducts hip  Laterally rotate thigh

Comments:

 Most lateral of group  2 heads

BICEPS FEMORIS

BICEPS FEMORIS

SEMITENDINOSUS

Origin:

 Ischial tuberosity

Insertion:

 Medial condyle of tibia

Action:

 Flexes knee  Extends thigh

Comment:

 Deep to semitendinosus

SEMIMEMBRANOSUS

HAMSTRING GROUP